Crushing and pulverizing machine.



J. L. HILLBR. @RUSHING AND PULVERIZING MACHINE. APPLICATION FILED JAN.13, 1912.

1,020,501 Patented Mar. 19, 1912.

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APPLICATION FILED JAN.13, 1912.

Patented Mar. 19, 1912.

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Il mm l I l I Il Ill I I l I l IJ Giro/buuf JOSEPH L. HILLER, OFMATTAPOISETT, MASSACHUSETTS.

CRUSHING AND PULVERIZING- MACHINE.

Specication of Letters Patent. Patented Mal. 19, 1912. l

Application led January 13, 1912. Serial No. 671,076.

j To all whom it may concern.'

to improvements in illustrated by way of example.

l' juste The invention has for its Obj ect to provide means forpositively adjusting the pivoted grinding cage of the machine withrelation to the hammers, to compensate for wear, and

`for other purposes.

The invention consists in a crushing machine provided with the cageadjusting mechanism hereinafter set forth and illustrated in` theaccompanying drawing, in which- Figure 1 is a vertical sectional view,Fig. 2 a partial, vertical, sectional view of a modified arrangement,Fig. 3 a sectional view on the line 3-3 of Fig. 1, and Fig. et a detailelevation of the shock-absorber.

In the .said drawings, the reference numeral 1 designates, generally,the casing of the machine, which may be of'any desired construction andform, and in which is arranged the rotary hammer carrying shaft'2 towhich is secured` the hammer-carrying disks 3, to which the hammers 4are pivotally connected as is usual and known in the art.

5 designates what is known in the art as the grinding-cage, pivotallymounted in the easin at one end 6, so that it may be add to and from thehammers to compensate for wear, and for other purposes.

The free end of this cage 5 carries a vertically disposed segmental rack7 the teeth of which are struck upon an arc that will permit the cage tobe raised and lowered throughout any desired, contemplated or designedrange of movement. The teeth of this segmental rack mesh with a rackwheel 8 carried bya shaft 9 suitably mounted in the casing, and it alsocarries a gear 10 0f `relatively large diameter and number of teethwhich meshes with a gear 11 carried by the shaft 12, which is providedwith a hand .wheel 13 for j manipulation of the mechanism. In Fi 1, thesegmental rack 7 is shown carried y and rigidly connected to the freeend of the grinding cage, and in Fig. 2 the corresponding rack 7 1 whichpreferably2 though not necessarily, is carried by and pivotallyconnected to the free end of said cage. As shown in Fig. 3, the rackwheel 8 has a hub 14 keyed to the shaft 9, and held'thereto by means ofset screws 15.

Surrounding the shaft 9 or the hub 14, in the illustrated example of theinvention, and loosely mounted thereon, is a shock-receiver composed oftwo sections 16, held together by means of bolts and nuts 17, as willclearly appearupon inspection of Figs. 1, 3 and 4. This shock-receiveris provided with fingers 18 which enter longitudinal grooves 19 formedin the sides of the rack 7 and serve the dual function of a guide forthe rack to hold the rack in mesh with rack-wheel 8 (this function beingchieiiy valuable when the rack is a pivoted one as in Fig. 2 of thedrawing) and to limit the degree of adjustability of the cage by cominginto contact with the closed ends 20 of the groovesy 19, which serve asabutments.

While, as hereinbefore stated, in the ractical use of such machines,wedging ofi-)coal between the edges of the cage and the casing of themachine prevents adjustment of the cage, except by some positive actionof the cage-manipulating mechanism, yet when dislodgment of theimpediment has been effected by the positive action, the weight of thecage is such that when free it responds to gravity with considerableforce, and itis to avoid the Shock which would otherwise occur that theshock-receiver is loosely mounted on the shaft 9, and to cushion thefall a suitable shock-absorber is combined with said shock-receiver, inthe example of the invention shown this consisting of suitableshoek-absorbing springs 21 arranged upon an arm 22 connected to theshock-receiver. The tension of the shock-absorbing springs may beregulated by means of the adjusting nuts 23.

In operation, when it is desired to raise or lower the cage, the handwheel is manipulated and, through the medium of the speed gear 10, thecage may be moved positively in either direction, so that should coal orother refuse have become lodged between the edges of the cage and thecasing of the machine the cage may, nevertheless, be manipulated. If,after such dislodgmentof any impediment to the movement of the cage, thelatter should fall, under the influence of gravity, the shock Whichwould otherwise be incident to. the action, is relieved in the mannerdescribed, that is to say,'by the partial rotation of theshock-receiver, cushioned by the shock-absorbing springs, when itsfingers meet abutments 20 at the ends of the grooves 19.

Having thus described my invention, what l. ltna crushing andpulverizing machine, the combination with a casing, hammers arranged foroperation therein, a pivoted grinding-cage, a vertically disposed rackconnected to the free end thereof, a rack-t Wheel in mesh With saidrack, means for operating the rack-Wheel to positivelyunove the rack foradjustment of the cage, and yielding means arranged in the path ofmovement of said rack for limiting the movement thereof. l

2., In a crushing and pulverizing machine, the combination with acasing, hammers arranged for operation therein, a pivoted grinding-cagea rack pivotally carried by the free end thereof, a rack-Wheel in meshWith saidv rack, and means for holding said rack in mesh with saidrack-Wheel.

3. In a crushing and pulverizing machine, the combination With a casing,hammers arranged for operation therein, of a pivoted grinding-cage, arack connected to the free end of said cage and provided with abutments,a rack-Wheel meshing with said rack, and a shock-receiver andshock-absorber having parts to engage said abutments.

4. In a crushing and pulverizing machine, the combination with a casing,hammers arranged for operation therein, of a pivoted grinding cage, arack connected to the free end of said cage and provided Withlongitudinal grooves, the ends of which constitute abutments forlimiting the degree of adjustment of said cage, a shaft carrying arack-Wheel in mesh with said rack, a shockreceiver loosely mounted onsaid shaft and having fingers engaging the longitudinal grooves of therack7 and a shock absorber combined yvith said shock-receiver.

In testimony whereof I have hereunto setV y my hand in presence of tWosubscribing Wit- DBSSSS.

Josnrn n ninnnn. Witnesses JOHN PARKER, HAROLD R. HAMON.

